Rock-drill cylinder-head.



N0. 6Bl,683. Patented Nov. l3, I900. A. BALL &. T., OFFICER.

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NITED STATES PATENT OFFICE.

ALBERT BALL AND THOMAS OFFICER, OF CLAREMONT, NEW HAMPSHIRE, ASSIGNORS TO THE SULLIVAN MACHINERY COMPANY, OF SAME PLACE AND CHICAGO, ILLINOIS.

ROCK-DRILL CYLINDER-HEAD.

SPECIFICATION forming part of Letters Patent No. 661,683, dated November 13, 1900.

Application filed June 20, 1899. Serial No. 721,214. (No model.)

T all whom it may conce n: the shoulder f engages the shoulder g and Be it known that we, ALBERT BALL and the shoulder f the shoulder 9 In this man- THOMAS OFFICER, residents of Claremont, in ner the bushing is securely held in place, and

the county of Sullivan and State of New Hampit cannot be displaced by any down ward force.

5 shire, have invented a new and useful Im- Any downwardly-directed force only tends to provementin Rock-DrillCylinder-Heads; and hold said bushing more securely in place. we do hereby declare the following to be afull, Only one shoulder may be employed if declear, and exact description thereof. sired.

Our invention relates to cylinder-heads for As stated, the bushing G is partible, and in lo rock-drills and like machines. each half are formed the grooves or recesses The main objects of our invention are to 71, adapted to receive and retain the babbitt provideacylinder-head with abearing which h or other suitable bearing metal. The rewill always present a smooth even bearingcesses h act to lock the metal securely in place surface to the reciprocating rod which carries and provide sufficient thickness of metal to :5 the cutting-fool and so reduce the cutting or prevent its breaking from the jars which it wearing of said rod and at the same time to receives in rock-drills of this character. By provide for the holding of the bearing sethe use of such a partible bushing easy accurely in place and for its convenient recess maybe had to the interior thereof when moval when desired, as well as to provide for is is desired to remove the old bearing metal 20 the proper packing of the head. and replace it with fresh metal or with the To these ends our invention comprises the old metal, provided it is not worn out. novel features hereinafter set forth and Within the cylinder-head e and resting 011 claimed. the annular seat 1 is the annular U-shaped To enable others skilled in the art to make packing 70, formed of leather or other flexi- 25 and use our invention, we will describe the ble material. A ring It, of leather or of some same more fully, referring to the accompanyrigid material, if desired, is inserted within ing drawings, in which-- the U-shaped packing 7o.

Figure 1 is a longitudinal section of a cyl- Above the bushing G is the upper bushing inder-head andaportion of the cylinder of a M, also formed in halves and provided with 30 suitable rock-drill embodying our invention. the hearing metal or babbitt m, secured With- Fig. 2 is a front View. Fig. 3 is a detail view in like grooves m. The lower or larger end of the packing. of said bushing M rests on the seat '22, within Like letters of reference indicate like parts the head 6, and bears against the ring It within each view. in the U-shaped packing k. This acts to 35 The letterctdesignates the lower end of the hold the packing securely in place, and incylinder of a suitable rock-drill, having the sures a tight joint where air is used as the lugs I), through which the rods (1 pass which motive power for operating the drill. secure the cylinder-head e to said cylinder. The smaller end of the bushing M enters Accordingly, said cylinder-head ehas thelugs the cylinder a, and between the shoulder 0,

40 6 corresponding to the lugs b, and through formed by the larger end of the bushing M,

which the rods (1 also pass. and the lower end of the cylinder is inter- The interior walls of the head or shelleare posed the packing 1'. Any suitable com- 0 formed with the annular shoulders ff, said pressible packing may be used for this purshoulders being of difierent diameters depose. The drawing up of the rods (1 acts to .5 creasing from the upper end and adapted to compress said packing and a very tight joint be engaged by corresponding shoulders g g is obtained. on the partible bushing G. When said bush- The above-described cylinder-head is par- 5 ing G is contained within the cylinder-head e, ticularly applicable to rock-drills operated by air, as the arrangements for packing are such as to reduce the loss of air by leakage to a minimum.

What we claim as our invention, and desire to secure by Letters Patent, is

1. A cylinder-head for rock-drills having one or more annular shoulders formed therein decreasing in diameter from the upper to the lower end of said head, and a partible bushing within said head having correspondingshoulders engaging said shoulders in said head, substantially as set forth.

2. A cylinder-head for rock-drills having one or more annular shoulders formed therein decreasing in diameter from the upper to the lower end of said head, a partible bushing within said head having corresponding shoulders engaging said shoulders in said head, said bushing having grooves formed therein, and Babbitt metal engaging said grooves, substantially as set forth.

3. In a cylinder-head for rock-drills,a bushing contained within the shell of said head, a U-shaped packing engaging an abutment on said bushing, aring within said packing, and

means bearing on said ring for holding it in the packing, substantially as set forth.

4. In a cylinder-head for r0ck-drills,a bushing'contained Within the shell of said head, a U-shaped packing engaging an abutment on said bushing, a ring within said packing, and an upper bushing bearing on said ring for holdingit in the packing, substantially'as set forth. r

5. A cylinder-head having a shoulder at the upper end thereof, a bushing resting with its lower end on said shoulder, the upper end of said bushing extending beyond said head and adapted to enter the cylinder, and packing interposed between a shoulder on said bushing and the lower end of said cylinder, substan tiallyas set forth.

In testimony whereof we, the said ALBERT BALL and THOMAS OFFICER, have hereunto set our hands.

' ALBERT BALL.

THOMAS OFFICER. Witnesses: I

GEO. E. WOLCOTT, JOHN H. OossITT. 

